CN109196767A - power control circuit - Google Patents
power control circuit Download PDFInfo
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- CN109196767A CN109196767A CN201680082635.8A CN201680082635A CN109196767A CN 109196767 A CN109196767 A CN 109196767A CN 201680082635 A CN201680082635 A CN 201680082635A CN 109196767 A CN109196767 A CN 109196767A
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- 230000001105 regulatory effect Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33571—Half-bridge at primary side of an isolation transformer
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/337—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration
- H02M3/3376—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration with automatic control of output voltage or current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/01—Resonant DC/DC converters
- H02M3/015—Resonant DC/DC converters with means for adaptation of resonance frequency, e.g. by modification of capacitance or inductance of resonance circuit
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/39—Circuits containing inverter bridges
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Control Of Electrical Variables (AREA)
- Inverter Devices (AREA)
Abstract
Provide a kind of current control circuit for power inverter.Power inverter has the primary circuit for receiving the supply current by the first power rail and the second power rail.It is once connected in primary circuit.Power inverter, which also has, provides the secondary circuit of output electric current.There is secondary connection in secondary circuit.Secondary connection is connected to primary connection.Controller controls one or more switches in primary circuit to control output electric current.The property of power inverter makes it have the reactance circuit for generating quadrature current.Current control circuit includes being connected to get around or eliminate the current-sensing circuit of quadrature current.Controller is connected to current-sensing circuit, and one or more switches are controlled based on the signal code incuded by current-sensing circuit.
Description
Technical field
The present invention relates to the power control circuit being used in power inverter and power converting method and methods.It is described herein
The invention mainly relates to be suitble to about the driver of light emitting diode (LED), battery charger and other need accurate adjust
Save DC-DC power inverter and power conversion side used in the application (but being not limited to these specific applications) of load current
Method.
Background technique
Many design applications, more particularly to the application of battery charging and LED illumination, it is desirable to be able to which offer accurately adjusts negative
Current-carrying power inverter.In most cases, power inverter is isolated form, is had by isolated power supply transformer magnetic induction
The primary circuit and secondary circuit of coupling.In these almost all of applications, there is the power controller positioned at primary side,
With the current detection circuit in secondary side, therefrom obtains feedback signal and sent to once using photo-coupler or similar device
The controller of side.
Resonant power converter topological structure is very suitable to power conversion application, largely efficient due to them
The advantages of rate and low radio frequency (RF) emit.Particularly, half-bridge topology converter becomes increasingly prevalent, and especially those are with LC
(inductor-capacitor, also referred to as series resonator), LLC (Inductivity-Inductivity-capacitor), LCC (inductivity-capacity-capacity) and LLCC (electricity
Sense-inductivity-capacity-capacity) topological structure.
Many offline power inverter applications, such as it is necessary to have low-down ripple contents and smart for LED driver
Constant current (CC) output characteristics really adjusted.General method is directly to detect output electric current in secondary side, and pass through isolation
Device (such as photo-coupler) sends it to the power controller of primary side.This method can increase the size and cost of product.
It is advantageous to use the CC method that similarity precision is realized with lower cost.
It is a kind of in the application with relatively narrow route and loading conditions range that induced current, which adjusts (PSCR),
The method that the CC control of sufficient degree may be implemented.For example, having the fixed output LED of single-stage using LC (series resonance) topology
Driver, being realized with PSCR has the CC output characteristics of good accuracy and low ripple.However, these examples cannot be adjusted accurately
Dark output (by reducing output current intensity), unless providing additional induction and control circuit.In order to keep good efficiencies
With extended dynamic range while low RF transmitting, it is changed to LLC, LCC or LLCC topology is usually feasible.However, at these
Primary and secondary electric current in topological structure cannot measure well at the both ends of route and loading condition, cause an induced electricity
Stream adjusts infeasible.
Fig. 6 shows an example of LLCC converter.In Fig. 7, the electric current for flowing through power inverter each section is shown
Out.Fig. 7 b shows the electric current that output rectifier module is sent to from transformer.Fig. 7 f, which is shown, flows through primary current detection electricity
The electric current of R1 is hindered, it is obvious very different, and Fig. 7 g shows error current.The electric current tribute of parallel resonance energy storage component C3, L3
Offer the waveform and numerical value for changing incuded average current, generate error, error reduce with the output power of converter and
Increase.
For example, US20130094248A1 (referring to Fig. 1), which discloses one kind, realizes one by induction primary current come work
The method of secondary side current regulation.However, this method by flow through appear in the reactance component in the circuit electric current produced by
Error influence.
US7948774B2 (Fig. 2) and US8842449B1 (Fig. 3) discloses a kind of by detection and a transformer winding
The voltage that the both ends for the capacitor being placed in series generate carrys out work and realizes the method that primary side is adjusted.If frequency is kept not
Become, this method will adjust average current.However, this only when route and loading condition remain unchanged or power output can be with
Realization when being conditioned in the case where not changing frequency, such as in phase-shifted full-bridge converter.Equally, this method by with it is above-mentioned
The influence of identical evaluated error.
US20150124489A1 (Fig. 4) discloses a kind of method realizing primary side and adjusting, and is become by induction with primary
The voltage that the isolation current transformer both ends that depressor windings in series is placed generate carrys out work.This method will realize a degree of tune
Section, as long as can be conditioned in the case where not changing frequency when route and loading condition remain unchanged or in power conveying
When, such as in phase shift full-bridge converter.Again, this method is influenced by evaluated error same as described above.
US20140361698 (Fig. 5) discloses a kind of method realizing primary side and adjusting, and this method passes through induction and electric bridge
The crest voltage that generates of the resistor both ends that are placed in series of a switching transistor carry out work.This method will provide undesirable
It adjusts, unless can be adjusted in the case where not changing frequency when route and loading condition remain unchanged or in power conveying
When section, such as in phase-shifted full-bridge converter.Equally, this method is influenced by evaluated error same as described above.
It is an object of the invention to overcome or improve at least one disadvantage of the prior art, or provide useful alternative
Case.
Summary of the invention
In a first aspect, the present invention provides a kind of current control circuit for power inverter, the power conversion
Device includes
Primary circuit, for receiving the source current for passing through the first power rail and the second power rail；
Primary connection in the primary circuit；
The secondary circuit of output electric current is provided；
Secondary connection in the secondary circuit, the secondary connection are connected to the primary connection；
One controller, one or more switches of the control in the primary circuit are to control the output electric current；And
One generates the reactance circuit of quadrature current；
The current control circuit includes:
One current-sensing circuit is connected to get around or eliminate quadrature current, and the controller is connected to the electricity
Stream sensor circuit simultaneously controls one or more of switches based on the signal code incuded by the current-sensing circuit.
The second aspect of the present invention provides a kind of power inverter, includes
Primary circuit, for receiving the source current for passing through the first power rail and the second power rail；
Primary connection in the primary circuit；
The secondary circuit of output electric current is provided；
Secondary connection in the secondary circuit, the secondary connection are connected to the primary connection；
One controller, one or more switches of the control in the primary circuit are to control the output electric current；
One generates the reactance circuit of quadrature current；And
Current control circuit as described above.
The third aspect of the present invention provides a kind of method of output electric current controlled in power inverter, the power
Converter includes:
Primary circuit, for receiving the source current for passing through the first power rail and the second power rail；
Primary connection in the primary circuit；
The secondary circuit of the output electric current is provided；
Secondary connection in the secondary circuit, the secondary connection are connected to the primary connection；
One controller, one or more switches of the control in the primary circuit are to control the output electric current；And
One generates the reactance circuit of quadrature current；
The described method includes:
A current-sensing circuit is connected to get around or eliminate the quadrature current；
The controller is connected to the current-sensing circuit；And
One or more of switches are controlled based on the signal code incuded by the current-sensing circuit.
The further feature of various embodiments of the invention is defined in the appended claims.It should be understood that these
Feature may include in the various combination of different embodiments of the invention.
In the full content (including claims) of this specification, the terms "include", "comprise" and other similar
Word should be understood the meaning of exhaustive, that is, the meaning of " including, but are not limited to ", and not mean that exclusive and exhaustive
, unless explicitly stated otherwise herein or context separately has clear demand.
Detailed description of the invention
Let us now refer to the figures and only describe by example the preferred embodiment of optimal mode according to the present invention, in which:
Fig. 1 is the schematic diagram of the current regulating circuit of a prior art；
Fig. 2 is the schematic diagram of the current regulating circuit of another prior art；
Fig. 3 is the schematic diagram of the current regulating circuit of another prior art；
Fig. 4 is the schematic diagram of the current regulating circuit of the another prior art；
Fig. 5 is the schematic diagram of the current regulating circuit of another prior art；
Fig. 6 is the schematic diagram of a prior art LLC converter circuit；
Fig. 7 a to 7g is the diagram for flowing through the electric current of each element of circuit shown in Fig. 6；
Fig. 8 is the schematic diagram of the power converter circuit of an embodiment according to the present invention；
Fig. 9 a to 9f is the diagram for flowing through the electric current of each element of circuit shown in Fig. 8；
Figure 10 is the schematic diagram of power converter circuit according to still another embodiment of the invention；
Figure 11 a to 11i is the diagram for flowing through the electric current of each element of circuit shown in Figure 10；And
Figure 12 is the schematic diagram of power converter circuit according to another embodiment of the present invention.
Specific embodiment
Referring to attached drawing, the embodiment of the present invention provides a kind of current control circuit 1 for power inverter 2.Power conversion
Device 2 has primary circuit 3, and primary circuit 3 is used to receive the supply current by the first power rail HT+ and the second power rail HT-.
4 are once connected in primary circuit 3.Power inverter, which also has, provides the secondary circuit 5 of output electric current, in secondary circuit 5
In have it is secondary connection 6.Secondary connection 6 is connected to primary connection 4.Controller U1 controls one or more of primary circuit 3
Switch is to control output electric current.In an illustrated embodiment, there are two switch S1 and S2.The property of power inverter 2 makes it
With the reactance circuit 7 for generating quadrature current.Reactance circuit 7 may include in capacity cell, inductance element or combinations thereof
It is one or more.Reactance circuit 7 can be virtual circuit, wherein one or more of capacity cell, inductance element or combinations thereof
It is intrinsic in the circuit of power inverter 2.Alternatively, reactance circuit 7 may include actual components, wherein capacity cell, inductance
One or more of element or combinations thereof may include true capacitor or actual inductance device.
Current control circuit 1 includes the current-sensing circuit 8 of connection to get around or eliminate quadrature current.Controller U1 quilt
It is connected to current-sensing circuit 8, and controls one or more switches based on the signal code incuded by current-sensing circuit 8
S1 and/or S2.
In some embodiments, as Fig. 8 and Figure 10 are best shown, primary connection 4 is first winding W1, and secondary connection
6 be the secondary winding W2 for being inductively couple to first winding W1.
In other embodiments, as Figure 12 is best shown, primary connection 4 is directly connected to secondary connection by wired connection
6。
In the embodiment shown in Fig. 8 and Figure 12, current-sensing circuit 8 connect 4 series connection with primary.It is specific real at these
It applies in example, current-sensing circuit 8 includes and once connect 4 concatenated current sensing resistors 9 (R1 in Fig. 8 and Figure 12).More
Specifically, in an illustrated embodiment, current sensing resistor connect 4 directly series connection with primary.Reactance circuit 7 is connected across one
Therefore the both ends of secondary connection 4 and current-sensing circuit 8, current-sensing circuit 8 get around reactance circuit 7.Shown in Fig. 8 and Figure 12
In specific embodiment, reactance circuit 7 includes the shunt inductance element for being connected across primary connection 4 and 9 both ends of current sensing resistor
L3.Reactance circuit 7 further includes the shunt-connected capacitive element C3 for being connected across primary connection 4 and 9 both ends of current sensing resistor.
In the embodiment shown in fig. 10, reactance circuit 7 includes magnetizing inductance element L3 associated with first winding W1.
Reactance circuit 7 further includes the shunt-connected capacitive element C3 in parallel with secondary winding W2.Current-sensing circuit 8 includes being inductively couple to two
The auxiliary winding 10 (W3 in Figure 10) of secondary winding W2.Current-sensing circuit 8 further includes and the concatenated error school of auxiliary winding 10
Positive network 11.Error correction network 11 generates error correction current equal with quadrature current and reverse phase.Error correction network
Generally include one or more of corrective capacity element, error correction inductance element or combinations thereof.Shown in Fig. 10 specific
Embodiment in, error connection network 11 includes that the error correction in parallel with error correction capacity cell 13 (C4 in Figure 10) is electric
Sensing unit 12 (L4 in Figure 10).
According to embodiment shown in Fig. 10, current-sensing circuit 8 is connected with error correction network 11, wherein electric current induced electricity
Road 8 receives error correction current to eliminate quadrature current.In specific embodiment shown in Fig. 10, current-sensing circuit 8
Including with the concatenated current sensing resistor 9 (R1 in Figure 10) of error correction network 11, current sensing resistor 9 receive error
Correcting current is to eliminate quadrature current.
In all embodiments shown in Fig. 8, Figure 10 and Figure 12, controller U1 can be based on by 8 institute of current-sensing circuit
The average value of the signal code of induction controls one or more switch S1 and/or S2.Selectively or in addition to this, controller
U1 can control one or more switch S1 based on the root mean square (RMS) of the signal code incuded by current-sensing circuit 8
And/or S2.
In these embodiments, secondary circuit 5 further includes rectification circuit 14, to receive output electric current and provide rectification output
Electric current.Rectified output current can for example be provided at least a LED or LED illumination System.As another example, it rectifies defeated
Electric current can be provided to an at least rechargeable battery out.
These embodiments are described under conditions of LLCC topology is the superset of LLCC, LLC, LCC and LC topological structure,
Suitable for half-bridge and full bridge configuration.
In some embodiments of the invention, in the embodiment that those of such as is suitable for use in switched-mode power supply, electric current can
To be divided into two or more branches, each branch has one or more resonant capacitors.In these cases, electric current sense
Circuit 8 is answered to be only located in a branch.It should be understood that within the scope of the invention, current-sensing circuit is still and once
4 series connection of connection, because even each branch receives one part of current, each branch also connect series connection with primary.Therefore, at these
In the case of, only the current-sensing circuit 8 in a branch will only obtain a part of electric current.
As will be appreciated by a person skilled in the art, in one embodiment, the present invention also provides a kind of control power
The method of output electric current in converter 2.Power inverter 2 has primary circuit 3, and primary circuit 3 is for receiving across first
The supply current of power rail HT+ and the second power rail HT-.4 are once connected in primary circuit 3.Secondary circuit 5 provides output
Electric current.There are secondary connection 6 in secondary circuit 5, secondary connection 6 is connected to primary connection 4.The primary electricity of controller U1 control
One or more switches in road 3 are to control output electric current.Power inverter 2 has the reactance circuit 7 for generating quadrature current.
The method for controlling the output electric current in power inverter 2 includes connection current-sensing circuit 8 to get around or eliminate quadrature current,
Controller U1 is connected to current-sensing circuit 8, and controls one based on the signal code incuded by current-sensing circuit 8
Or multiple switch.In some embodiments, one or more is controlled based on the signal code incuded by current-sensing circuit
The step of switch is the average value based on signal code.Selectively or in addition to this, based on being felt by current-sensing circuit
The signal code answered is being the RMS based on signal code the step of controlling one or more switch.
The ginseng that the embodiment of the present invention described in the description is designed as the power inverter based on LLCC topology
It examines.LLCC topology is the superset of associated topologies especially LLCC, LLC, LCC and LC topological structure, can be applied to half-bridge
And full bridge configuration.Described the embodiment of the present invention is suitable for each of these topological structures.
Fig. 8 and embodiment shown in Fig. 10 are theoretically realized identical as a result, still due to parasitic antenna, answer in given
In, one embodiment can be better than another embodiment.The reflective loads component that both of which passes through isolation primary current
And passing it to the controller of the primary side positioned at power transformer T1, i.e. primary circuit 3 works.The signal can be whole
Stream, the output electric current for filtering and being used to control power inverter 2.This method is using relatively easy, and in various operating conditions
It is lower that accurate error compensation is provided.
In order to accurately export the adjusting of electric current, it is desirable that the current sensing signal (CS) of monitoring accurately indicates to be exported whole
Flow specification (scale) form of the output current impulse of grade transmitting.Therefore, in each example, various current waveforms and electricity
The final fidelity of influenza induction signal is described.
Fig. 8 shows the half-bridge application including DC power rail HT+ and HT-, provides a pair of switches controlled by controller U1
S1 and S2.Controller U1 provides the basic square wave electricity of driving series resonance energy storing members C2 and L1, parallel resonance energy storing members C3 and L3
DC output power is provided to output rectification stage D20 to D23 (i.e. rectification circuit 14) and energy storage by transformer T1 by potential source
Element C20 is extremely loaded.
The electric current for flowing through shunt capacitor C3 and inductor L3 gets around current sensing elements 9 (R1) to avoid facilitating to electric current
Any error of inductive signal.However, transformer magnetizing current flows through current sensing elements really, therefore to current sensing signal
Some errors are generated, but if magnetization induction is very big, then this is negligible.Controller U1 can also include to the slight error
Compensation.
Fig. 9 a to Fig. 9 f shows relevant current waveform.The electric current for flowing through shunt capacitor C3 and inductor L3 gets around electricity
Sense resistor is flowed, so as to avoid any error due to caused by C3 and L3.Fig. 9 b, which is shown, enters rectification in output electric current
The output electric current of secondary circuit 5 before circuit 14.Fig. 9 c and Fig. 9 d respectively illustrate the electric current for flowing through L3 and C3.Fig. 9 f is shown
The electric current incuded by controller accurately indicates the electric current for being transmitted to output shown in 9b.
Embodiment shown in Fig. 8 is relatively simple implementation, but the parasitic antenna in the circuit actually manufactured may be led
Cause undesirable influence.Specifically, the electric leakage between the winding in transformer T1 may cause additional ringing effect, this may
Cause to include for example increased switching loss and the undesirable influence that RF emits.Therefore, in some embodiments, such as Figure 10
It is best shown, it is advantageous that will be placed on after transformer leakage incudes in the C3 in secondary circuit 5 so that the ringing effect
It minimizes.In addition, including L3 preferably in transformer magnetization induction, also as shown in Figure 10 to reduce cost.Such problems
It is, the current-sensing circuit in primary circuit 3 will incude the extra current as caused by C3 and transformer magnetizing current, cause
Measure the error of average secondary current.Implementation shown in Fig. 10 is illustrated a kind of straightforward procedure for eliminating error, allows to
In the primary side of potential-energy barrier, i.e., true average current is sensed on primary circuit 3.
Embodiment in Figure 10 is the half-bridge application for including DC power rail HT+ and HT-, provides one controlled by controller U1
To switch S1 and S2.Controller provides the basic square-wave voltage source of driving series resonance energy storing members C2 and L1, by DC output power
Transformer T1 by having magnetization induction L3 is provided to shunt capacitor C3 and output rectification stage D20 to D23 (rectification circuit
14) and energy storage components C20 is extremely loaded.Auxiliary winding 10 (W3) on transformer T1 drives 11 (C4 of error correction network
And L4) to drive negative-phase sequence curent to enter current sensing resistor 9 (R1).It is designed to generate by the electric current of C4 and L4 and passes through electricity
Flow the electric current of sense resistor 9, the electric current of the electric current and L3 and C3 generation is equal and reverse phase, thus in current sensing resistor
The voltage signal for exporting electric current for being substantially represented in the secondary circuit 5 that output electric current enters before rectification circuit 14 is generated on 9.
Figure 11 a to Figure 11 i shows waveform relevant to embodiment shown in Fig. 10.The electric current of load is supplied to as schemed
Shown in 11a, and the electric current before rectifying is as shown in figure 11b.Electric current (as illustrated in fig. 11d) in secondary winding W2 is the electricity by C3
The sum of load current before flowing (as shown in fig. 11c) and rectifying (as shown in figure 11b).Electric current (such as Figure 11 f in first winding W1
It is shown) it is that electric current (multiplied by turn ratio) in secondary winding W2 adds magnetizing current (as illustrated in fig. 11e) by L3.In order to produce
The raw electric current proportional to uncorrected load current, is added to primary electricity by the electric current of error correction network 11 (L4 and C4)
On stream.The electric current generated in current sensing resistor 9 is presented to controller U1, as shown in Figure 11 i.The rectification of the signal is average
Value accurately indicates average load current.
It is corrected to provide Optimal Error to exemplary application, the optimum value of C4 and L4 are provided by following equation:
It will be understood by those skilled in the art that above-described embodiment can be applied in many ways.For example, embodiment is same
Suitable for LLC, LCC, LLCC resonance or other forward direction code converters, has and need the reactance component corrected to realize accurately
One time induced current is adjusted.Presently described embodiment is shown about half-bridge topology, but to be equally applicable to include full-bridge, more
Phase, recommend including other topological structures.
Present invention advantageously applies to which power inverter is isolated, but non-isolated type can also be efficiently used for.The present invention
It is useful in the case where being difficult to the feedback signal for indicating output electric current being transmitted to controller from output circuit.For example, control
Device processed can be used as the reference of the power rail different from the power rail for being connected to load, such as can reside in comprising passive function
In the application of rate factor correcting.In such applications, output electric current is adjusted by using the embodiment of the present invention to be obtained
Significant cost advantage, because this avoids the substitution adjustings using photo-coupler, electric current induction amplifier, level displacement shifter etc.
The higher cost of method.Figure 12 gives similar with embodiment shown in Fig. 8 according to another embodiment of the present invention non-isolated
The example of application.Embodiment in Figure 12, instead of connecting with secondary winding W2 primary circuit 3 and secondary by first winding W1
The primary connection 4 of primary circuit 3 is directly connected to the secondary connection 6 of secondary circuit 5 by the transformer T1 of circuit 5, wired connection.
Output power can use full-wave rectification (shown in as before), halfwave rectifier or without any rectification quilt
It is transmitted to load.Error cancelling method is suitable for more complicated controlled resonant converter topological structure, wherein reactance error correction network
Other inductance, capacitor and resistive element can be optionally included, more accurately calculates that output is negative will pass through induction primary current
Carry electric current.Multiple antiresonant circuits for needing error correction may be present.One or more of these antiresonant circuits can
To be located in secondary winding (shown in as described above) or be located in other transformer windings.
It should be understood that previous embodiment is only used for describing the exemplary embodiment of the principle of the invention, and the present invention is simultaneously
It is not limited to this.Spirit and substance of the present invention, and this are not departed from by the various changes and modifications that those skilled in the art carry out
Within a little variants and modifications are also covered by the scope of the invention.Therefore, although the invention has been described with reference to a specific example, but
It is it will be understood by those skilled in the art that the present invention can be presented in the form of many other.Those skilled in the art can also manage
Solution, the feature of the various examples described can be combined into other combinations.Particularly, it will be understood by those skilled in the art that
There are the different modifications of foregoing circuit within the scope of the invention.To those skilled in the art, foregoing circuit is disposed with
Many possible arrangements.Therefore, circuit element shown in embodiment can be freely interchanged, and in different arrangements or sequence is put
It sets, but the circuit described function about initial placement or sequence in the embodiments described is still provided, therefore,
It still falls in the scope of the present invention.
Claims (27)
1. a kind of current control circuit for power inverter, the power inverter include:
Primary circuit, for receiving the source current for passing through the first power rail and the second power rail；
Primary connection in the primary circuit；
The secondary circuit of output electric current is provided；
Secondary connection in the secondary circuit, the secondary connection are connected to the primary connection；
One controller, one or more switches of the control in the primary circuit are to control the output electric current；And
One generates the reactance circuit of quadrature current；
The current control circuit includes:
One current-sensing circuit is connected to get around or eliminate quadrature current, and the controller is connected to the electric current sense
It answers circuit and one or more of switches is controlled based on the signal code incuded by the current-sensing circuit.
2. current control circuit according to claim 1, which is characterized in that described to be once connected as first winding, and two
The secondary secondary winding for being connected as being inductively couple to the first winding.
3. current control circuit according to claim 1, which is characterized in that wired connection directly connects the primary connection
It is connected to the secondary connection.
4. according to claim 1 to current control circuit described in any one in 3, which is characterized in that the reactance circuit
Including one or more of capacity cell, inductance element or combinations thereof.
5. according to claim 1 to current control circuit described in any one in 4, which is characterized in that the electric current induction
Circuit is once connected in series in described.
6. current control circuit according to claim 5, which is characterized in that the current-sensing circuit includes and described one
The secondary current sensing resistor being connected in series in.
7. according to current control circuit described in any one in claim 5 to 6, which is characterized in that the reactance circuit
The both ends of the primary connection and the current-sensing circuit are connected across, therefore the current-sensing circuit gets around the reactance electricity
Road.
8. current control circuit according to claim 7, which is characterized in that the reactance circuit includes being connected across described one
The shunt inductance element of secondary connection and the current sensing resistor both ends.
9. according to current control circuit described in any one in claim 7 to 8, which is characterized in that the reactance circuit
Shunt-connected capacitive element including being connected across the primary connection and the current sensing resistor both ends.
10. current control circuit according to claim 2, which is characterized in that the reactance circuit include with it is described primary
The associated magnetizing inductance element of winding.
11. the current control circuit according to claim 2 or 10, which is characterized in that the reactance circuit include with it is described
The shunt-connected capacitive element of secondary winding parallel connection.
12. current control circuit described in any one in 0 to 11 according to claim 1, which is characterized in that the electric current sense
Answering circuit includes the auxiliary winding coupled with the secondary inductance, the error correction network with the auxiliary winding serial,
The error correction network generates error correction current equal with the quadrature current and reverse phase.
13. current control circuit according to claim 12, which is characterized in that the error correction network includes error school
One or more of positive capacity cell, error correction inductance element or combinations thereof.
14. current control circuit according to claim 13, which is characterized in that the error correction network includes and error
Correct the error correction capacity cell of inductance element parallel connection.
15. current control circuit described in any one in 2 to 14 according to claim 1, which is characterized in that the electric current sense
Circuit and the error correction series network are answered, the current-sensing circuit receives the error correction current to eliminate the electricity
Quadrature component.
16. current control circuit according to claim 15, which is characterized in that the current-sensing circuit include with it is described
The current sensing resistor of error correction series network, the current sensing resistor receive the error correction current to eliminate
The quadrature current.
17. a power inverter, comprising:
Primary circuit, for receiving the source current for passing through the first power rail and the second power rail；
Primary connection in the primary circuit；
The secondary circuit of output electric current is provided；
Secondary connection in the secondary circuit, the secondary connection are connected to the primary connection；
One controller, one or more switches of the control in the primary circuit are to control the output electric current；
One generates the reactance circuit of quadrature current；And
According to claim 1 to current control circuit described in any one in 16.
18. power inverter according to claim 17, which is characterized in that the controller is based on being incuded by the electric current
The average value of the signal code that circuit is incuded controls one or more of switches.
19. power inverter according to claim 17, which is characterized in that the controller is based on being incuded by the electric current
The root-mean-square value of the signal code that circuit is incuded controls one or more of switches.
20. power inverter described in any one in 7 to 19 according to claim 1, which is characterized in that the secondary circuit
It further include rectification circuit, to receive the output electric current and provide rectified output current.
21. power inverter according to claim 20, which is characterized in that the rectified output current is provided at least
One light emitting diode.
22. power inverter according to claim 20, which is characterized in that the rectified output current is provided at least
One rechargeable battery.
23. a kind of method of output electric current of control in power inverter, the power inverter include:
Primary circuit, for receiving the source current for passing through the first power rail and the second power rail；
Primary connection in the primary circuit；
The secondary circuit of the output electric current is provided；
Secondary connection in the secondary circuit, the secondary connection are connected to the primary connection；
One controller, one or more switches of the control in the primary circuit are to control the output electric current；And
One generates the reactance circuit of quadrature current；
The described method includes:
A current-sensing circuit is connected to get around or eliminate the quadrature current；
The controller is connected to the current-sensing circuit；And
One or more of switches are controlled based on the signal code incuded by the current-sensing circuit.
24. according to the method for claim 23, which is characterized in that described to be once connected as first winding, and secondary connection
For the secondary winding for being inductively couple to the first winding.
25. according to the method for claim 23, which is characterized in that the primary connection is directly connected to institute by wired connection
State secondary connection.
26. according to method described in any one in claim 23 to 25, which is characterized in that based on being incuded by the electric current
The signal code that circuit is incuded is being the average value based on the signal code the step of controlling one or more of switches
's.
27. according to method described in any one in claim 23 to 25, which is characterized in that based on being incuded by the electric current
The signal code that circuit is incuded is being the root mean square based on the signal code the step of controlling one or more of switches
Value.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2016/070166 WO2017117714A1 (en) | 2016-01-05 | 2016-01-05 | Power control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109196767A true CN109196767A (en) | 2019-01-11 |
| CN109196767B CN109196767B (en) | 2023-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680082635.8A Active CN109196767B (en) | 2016-01-05 | 2016-01-05 | Power control circuit |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US10658932B2 (en) |
| EP (1) | EP3400643A4 (en) |
| CN (1) | CN109196767B (en) |
| WO (1) | WO2017117714A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230113700A1 (en) * | 2020-03-04 | 2023-04-13 | Redisem Ltd. | Controller, Power Converter, and Associated Methods |
| CN113014112B (en) * | 2021-03-25 | 2023-06-30 | 矽力杰半导体技术(杭州)有限公司 | Control circuit, control method and power converter |
| CN112953241A (en) * | 2021-03-25 | 2021-06-11 | 矽力杰半导体技术(杭州)有限公司 | Power converter |
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|---|---|---|---|---|
| CN101164221A (en) * | 2005-04-01 | 2008-04-16 | Nxp股份有限公司 | Control of a resonant converter |
| CN101622777A (en) * | 2007-02-27 | 2010-01-06 | Nxp股份有限公司 | Load current detection in electrical power converters |
| CN102017380A (en) * | 2009-02-06 | 2011-04-13 | 新电元工业株式会社 | Current detecting circuit and transformer current measuring system |
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| US5930121A (en) * | 1997-03-14 | 1999-07-27 | Linfinity Microelectronics | Direct drive backlight system |
| US6198234B1 (en) * | 1999-06-09 | 2001-03-06 | Linfinity Microelectronics | Dimmable backlight system |
| EP1878107B1 (en) | 2005-04-26 | 2012-08-15 | Koninklijke Philips Electronics N.V. | Resonant dc/dc converter with zero current switching |
| US7459893B2 (en) * | 2006-04-20 | 2008-12-02 | Mark E Jacobs | Optimal feedback control of switch-mode power converters |
| GB2439997A (en) * | 2006-07-07 | 2008-01-16 | Cambridge Semiconductor Ltd | Estimating the output current of a switch mode power supply |
| JP4378400B2 (en) | 2007-08-28 | 2009-12-02 | 日立コンピュータ機器株式会社 | Bidirectional DC-DC converter and control method for bidirectional DC-DC converter |
| GB2478992B (en) * | 2010-03-26 | 2014-11-19 | Russell Jacques | Regulating controller for controlled self-oscillating converters using bipolar junction transistors |
| DE112012005373A5 (en) * | 2011-12-23 | 2014-10-02 | Tridonic Gmbh & Co. Kg | LED converter with resonant converter |
| US8842449B1 (en) | 2013-03-12 | 2014-09-23 | XP Power Limited | LLC resonant converter with lossless primary-side current feedback |
| US9467054B2 (en) | 2013-11-07 | 2016-10-11 | Futurewei Technologies, Inc. | Current sensing apparatus for resonant tank in an LLC resonant converter |
| US9331584B2 (en) * | 2014-06-30 | 2016-05-03 | Sanken Electric Co., Ltd. | Switching power-supply device |
| CN104617792B (en) | 2014-12-24 | 2017-12-15 | 昂宝电子（上海）有限公司 | System and method for the voltage-regulation of the power converting system of primary side regulation |
| WO2018137240A1 (en) * | 2017-01-26 | 2018-08-02 | Redisem Ltd. | Power converter circuit |
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2016
- 2016-01-05 CN CN201680082635.8A patent/CN109196767B/en active Active
- 2016-01-05 WO PCT/CN2016/070166 patent/WO2017117714A1/en active Application Filing
- 2016-01-05 EP EP16882861.4A patent/EP3400643A4/en active Pending
- 2016-01-05 US US16/068,147 patent/US10658932B2/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101164221A (en) * | 2005-04-01 | 2008-04-16 | Nxp股份有限公司 | Control of a resonant converter |
| CN101622777A (en) * | 2007-02-27 | 2010-01-06 | Nxp股份有限公司 | Load current detection in electrical power converters |
| CN102017380A (en) * | 2009-02-06 | 2011-04-13 | 新电元工业株式会社 | Current detecting circuit and transformer current measuring system |
Also Published As
| Publication number | Publication date |
|---|---|
| US10658932B2 (en) | 2020-05-19 |
| EP3400643A4 (en) | 2019-08-28 |
| CN109196767B (en) | 2023-05-30 |
| US20190036456A1 (en) | 2019-01-31 |
| WO2017117714A1 (en) | 2017-07-13 |
| EP3400643A1 (en) | 2018-11-14 |
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